I also want a LFG, but as a separate option not as a replacement for current M+. There are many people who want to stick with the current format. Let them. If they enjoy it, be my guest.
But for players like us who don’t like it and haven’t liked it for many seasons now, make a LFG M+. Let us work out all the issues others think there will be. I’m sure that I can make a LFG M+ that works way better for me than the current M+ system.
See point 7 in this article Suggestion box